Improvement in steam-pumps



` 3 Sheets-Sheet 1. J'. MAYHER. STEAM-PUMP. NO.18,434. Patenta& Aug.1,1875.

SSheets-Sheet z. J. MAYHER.

sTEAM-UMr. N.180,434. Pateted Auga 1. 1876.

N4PETERS, PHoTo-uTHoGRAPHER. WASHINGYOH, c 40.

v 3 Sheets--Sheet 3. J". MAYHER.

STEAM-PUMP. No.180,434. Pat ented Aug.1,1876.

N. PETEns. PHOYO-LITMDGNAFMER, WASHKNGTON n C UNITED STATES JOHN MAYHER, OFEAST HAMPTON, MASSAGHUSETTS.

IMPROVEMENT IN STEAM-PUMPS.

Specification forming part of Letters Patent No. 1804134, dated August 1, 1876.; application filed I May 25, 1876.

- new and Improved Steam-Pump; and I do hereby declare that the following is a fulland exact description of the same, reference being had to the accompanyingdrawings, and to the letters ot' reference marked tlereon.

This invention consists mainly, first, in the combination, with a tubular column having an overhanging steam cylinde' projecti'g from its upper extremity, of a Valve-chest cast in the turn ot' the column, the Construction being' such that strength and rigidityis given to the part most subject to strain; and, second, i-providing the column with elongated side openings, so located that the strength of the column is not affected, and so, also, that the working parts within the column can be readily reached. It further consists in certain details of Construction, which, in connection with the foregoing, will be fully described hereinafter. i

In the drawings, Figure 1 represents a perspective view of ny improved pump; Figs. 2 and 3, partial 'sectional elevations taken in i vertical planes at right angles to each other;

Fig. 4, a side elevation; Fig. 5, an enlarged sectional elevation of the valve-seats and valves; Fig. 6, a plan View of the upper divis- -ion of the water-cylinder; Fg. 7, a perspecti've View of the device for holding the Valveseats in place, and Fig. 8 a vertical sectional elevation of the entire pmp.

To enable others skilled in the art to make and use my invention, I will now proceed to describe fully its construction and manner of operation.

A represents the base-piece of the pump, by which the other parts are supported. B represents a round tapering column rising from the base-piece, which is divided on the line a: x, Fig. 4, into two main portions, b b as shown.

The construction of the portion b is as follows: b represents the pump barrel or cylinder, in which the piston moves. b represents the 'water-chamber containing the valves and water-ways, as shown. b Fig. 3, represents the suction-opening, through which water is drawn into the cylinder; and b the deliveryopening, through which it is discharged. b?, Fig. 5, represents aseatof oneof the dischargevalves, provided with a stud, b upon which the valve proper moves. b, Figs. 2, 3, and 7, represents a transverse bar, having depending lugs or studs b, which is placed upon the chamber b near its upper edge, so as to be in line overthe stud of the valve seats, as shown. b represents an intermediate key or'eq'uivalent fastenin'g device, iterposed between the stud of the bar I and the stud b of the Valveseat, for the purpose of holding` the latter se curely in place. This key nay be held against lateral displacement by a proper slot or recess in the lower end of stud b or by any other suitable means. The bar being removable, the parts, of course, which are held by it may be removed also When occasion requires.

The construction of portion I) is asfollows: b represents a division-plate or partition in the lower part of the portion, by means of which an air-chanber is formed, as shown. b b represent cylindrical enlargements or bearings upon the front and back of the column, which are provided With proper openings for receiving the shaft, as shown. b b represent openings of an elongated oval form in the sides of the column, by means of which convenient access is had to the eccentric actuatin g the steam-valve. b, Fig. 8, represents the valve-chest castin the right-angledturn `b to which latter the cylinder b is attached,

as shown.

The remaining partsofthe pump willnowbe de may be readiiy reached when desired.

The operation of this pump is similar to others of its class, and it will not therefore be particularly described here. Some of the advantages ot' the described Construction are as follows: By the employment of the round tapering column the material of Construction weight.

is disposed in the most advantageous manner to' secure great strength without excessive By casting the circular valve-chest in the turn of the column, as shown in Fig. 8, the angle is strengthened at its weakest point, the chest, by uniting the npper side to the lower portions of the column, serving as a brace to resist the thrust of the pis'ton in either direction. The location of the Valvechest, also, in position over the central portion of the crank-shaft, is advantageous, because the valve may be actuated by a simple eccentric upon that portion of the shaft which is well adapted to take the strain. -The oval openings, being located in the side of the column, may be eXtended high enough to permit the valve-stem stuffing-box to be reached, as shown in Fig. 8, without cutting into the throat of the column, which, being left whole, is consequently adapted to resist the strain to which it is subjected. By locating the airchamber within the column, the necessity of providing independent space is avoided. By

dividing the column into two main parts the work ot' putting in the water-valves and valve-seats is easily accomplished. In case of accident by frost or otherwise, this part of the pump can be replaced at little expense. The discharge-valve seats are properly held in place by the bar and key, which are simple in construction. i

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In combination with a tubular column having an overhanging steatn-cylinder projecting from its upper extremity, a valve-chest cast in the turn of the column, the latter serving as a braee to give strength and rigidity to the weakest portion, substan tially as described.

2. A taperi'g tuhular column having an overhanging cylinder projecting from its upper extremity and oval openings so located in its sides that the threat, subject to strain by the movement of the piston in the cylinder, is left entire, as and for the purpose described.

3. A tapering tubular column having` a steam-cylinder projecting from its upper eX- tremity, a valve-chest cast in its turn, and elongated side openings, in' combination with the valve and pump Operating mechanisms, substantially as described.

4. The column B, having the division-plate b adapted to form an air-chamber, and provided with the openings b above the partition, as shown.

5. The combination of the part I), having the water-chamber, with the part b havingthe air-chamber and elongated openings, as described.

6. The combination of the bar b stud b and key b with the valve-seat b as described.

This specificatiou signed and witnessed this 5th (lay of May, 1876.

JOHN MAYHER.

Witnesses:

JAMES PENDERGAST, DENNIS HICKEY. 

